Solid-phase hetero epitaxial growth of α-phase formamidinium perovskite
| Autor: | Rui Wang, Xiaoqing Pan, Chungseok Choi, Yu Huang, Jin-Wook Lee, Lizhi Zhang, Mina Yoon, Michael E. Liao, Yang Yang, Selbi Nuryyeva, Changwon Park, Shaun Tan, Mingjie Xu, Chenhui Zhu, Mark S. Goorsky, Sung-Joon Lee, Kenny Huynh, Tae Hee Han |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Growth kinetics Science General Physics and Astronomy Crystal growth 02 engineering and technology 010402 general chemistry Epitaxy 01 natural sciences General Biochemistry Genetics and Molecular Biology Article law.invention law Solar cell Electronic devices Organic-inorganic nanostructures lcsh:Science Diode Multidisciplinary business.industry Synthesis and processing General Chemistry 021001 nanoscience & nanotechnology 0104 chemical sciences Formamidinium Semiconductor Template Chemical engineering lcsh:Q 0210 nano-technology business |
| Zdroj: | Nature Communications, Vol 11, Iss 1, Pp 1-11 (2020) Nature Communications Nature communications, vol 11, iss 1 |
| ISSN: | 2041-1723 |
| Popis: | Conventional epitaxy of semiconductor films requires a compatible single crystalline substrate and precisely controlled growth conditions, which limit the price competitiveness and versatility of the process. We demonstrate substrate-tolerant nano-heteroepitaxy (NHE) of high-quality formamidinium-lead-tri-iodide (FAPbI3) perovskite films. The layered perovskite templates the solid-state phase conversion of FAPbI3 from its hexagonal non-perovskite phase to the cubic perovskite polymorph, where the growth kinetics are controlled by a synergistic effect between strain and entropy. The slow heteroepitaxial crystal growth enlarged the perovskite crystals by 10-fold with a reduced defect density and strong preferred orientation. This NHE is readily applicable to various substrates used for devices. The proof-of-concept solar cell and light-emitting diode devices based on the NHE-FAPbI3 showed efficiencies and stabilities superior to those of devices fabricated without NHE. Though literature reports metal halide perovskite epitaxial growth on various substrates, controlling film growth for device applications remains a challenge. Here, the authors report kinetic-controlled growth of halide perovskite thin films on various substrates via layered perovskite templates. |
| Databáze: | OpenAIRE |
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